Is a bus driver permitted to talk with the passengers while driving?

1. Yes, but only with security personnel on duty.
2. Correct answer: Yes, but only about matters relating to the journey and without turning his head away from the road.
3. A bus driver is strictly forbidden to talk with the passengers.
4. Yes, but only with the conductor or ticket seller.

WhyThe driver may talk to passengers while driving, but only about the journey and without turning their head from the road. A total ban is wrong, and 'only with the conductor' is made up.